<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    .big{width:240px;height:80px;border: 1px solid #000;padding-left:20px;}
    .big div{width: 40px;height: 40px;margin-right:20px;
    background-color:crimson;float: left;}
    </style>
</head>
<body>
    <div class="big">
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
    </div>
</body>
</html>